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<div class="title">CommandManager.h</div>  </div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="preprocessor">#pragma once</span></div><div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="preprocessor">#include &lt;memory&gt;</span></div><div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="preprocessor">#include &lt;stdexcept&gt;</span></div><div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="preprocessor">#include &lt;type_traits&gt;</span></div><div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="preprocessor">#include &lt;vector&gt;</span></div><div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="preprocessor">#include &quot;commands/Command.h&quot;</span></div><div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;<span class="preprocessor">#include &quot;peprassert.h&quot;</span></div><div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;</div><div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;<span class="keyword">namespace </span><a class="code" href="namespacepepr3d.html">pepr3d</a> {</div><div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;</div><div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> Target&gt;</div><div class="line"><a name="l00015"></a><span class="lineno"><a class="line" href="classpepr3d_1_1_command_manager.html">   15</a></span>&#160;<span class="keyword">class </span><a class="code" href="classpepr3d_1_1_command_manager.html">CommandManager</a> {</div><div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;   <span class="keyword">public</span>:</div><div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;    <span class="keyword">using</span> <a class="code" href="classpepr3d_1_1_command_base.html">CommandBaseType</a> = <a class="code" href="classpepr3d_1_1_command_base.html">CommandBase&lt;Target&gt;</a>;</div><div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;    <span class="keyword">using</span> StateType = decltype(std::declval&lt;const Target&gt;().saveState());</div><div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;</div><div class="line"><a name="l00021"></a><span class="lineno"><a class="line" href="classpepr3d_1_1_command_manager.html#ae889dad593d812deb65c56c07a32bfdb">   21</a></span>&#160;    <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="classpepr3d_1_1_command_manager.html#ae889dad593d812deb65c56c07a32bfdb">SNAPSHOT_FREQUENCY</a> = 10;</div><div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;</div><div class="line"><a name="l00024"></a><span class="lineno"><a class="line" href="classpepr3d_1_1_command_manager.html#aa4545583769603c741a2dab3e876a5fb">   24</a></span>&#160;    <span class="keyword">explicit</span> <a class="code" href="classpepr3d_1_1_command_manager.html#aa4545583769603c741a2dab3e876a5fb">CommandManager</a>(Target&amp; target) : mTarget(target) {}</div><div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;</div><div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;    <span class="keywordtype">void</span> <a class="code" href="classpepr3d_1_1_command_manager.html#a0aae9681640f09da9c908154b805273e">execute</a>(std::unique_ptr&lt;CommandBaseType&gt;&amp;&amp; command, <span class="keywordtype">bool</span> join = <span class="keyword">false</span>);</div><div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;</div><div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;    <span class="keywordtype">void</span> <a class="code" href="classpepr3d_1_1_command_manager.html#af71406e4f6aee85b1cb9fe02b9a8b13e">undo</a>();</div><div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;</div><div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;    <span class="keywordtype">void</span> <a class="code" href="classpepr3d_1_1_command_manager.html#acb90e67e6e97c0d143ddb9e67ccbebb2">redo</a>();</div><div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;</div><div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;    <span class="keywordtype">bool</span> <a class="code" href="classpepr3d_1_1_command_manager.html#a2d53a763697329e206e72ddeef1ce75b">canUndo</a>() <span class="keyword">const</span>;</div><div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;</div><div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;    <span class="keywordtype">bool</span> <a class="code" href="classpepr3d_1_1_command_manager.html#a2ae3625cc0baac8bb27f659ee0182eff">canRedo</a>() <span class="keyword">const</span>;</div><div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;</div><div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;    <span class="keyword">const</span> CommandBaseType&amp; <a class="code" href="classpepr3d_1_1_command_manager.html#a1dc9b90a3f5a6f14502999187a9d45ef">getLastCommand</a>() <span class="keyword">const</span>;</div><div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;</div><div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;    <span class="keyword">const</span> CommandBaseType&amp; <a class="code" href="classpepr3d_1_1_command_manager.html#ab5767a90a4f309d166210a8e43dec560">getNextCommand</a>() <span class="keyword">const</span>;</div><div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;</div><div class="line"><a name="l00049"></a><span class="lineno"><a class="line" href="classpepr3d_1_1_command_manager.html#a95e84353863839ebded5131aef0c06b9">   49</a></span>&#160;    <span class="keywordtype">size_t</span> <a class="code" href="classpepr3d_1_1_command_manager.html#a95e84353863839ebded5131aef0c06b9">getVersionNumber</a>()<span class="keyword"> const </span>{</div><div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;        <span class="keywordflow">return</span> <a class="code" href="classpepr3d_1_1_command_manager.html#a4c73b4cacd523878dbef2cb7ed4805fa">mVersion</a>;</div><div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;    }</div><div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;</div><div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;   <span class="keyword">private</span>:</div><div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;    Target&amp; mTarget;</div><div class="line"><a name="l00056"></a><span class="lineno"><a class="line" href="classpepr3d_1_1_command_manager.html#a55847061c90eb00139370aa16d88a52a">   56</a></span>&#160;    std::vector&lt;std::unique_ptr&lt;CommandBaseType&gt;&gt; <a class="code" href="classpepr3d_1_1_command_manager.html#a55847061c90eb00139370aa16d88a52a">mCommandHistory</a>;</div><div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;</div><div class="line"><a name="l00059"></a><span class="lineno"><a class="line" href="structpepr3d_1_1_command_manager_1_1_snapshot_pair.html">   59</a></span>&#160;    <span class="keyword">struct </span><a class="code" href="structpepr3d_1_1_command_manager_1_1_snapshot_pair.html">SnapshotPair</a> {</div><div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;        StateType state;</div><div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;        <span class="keywordtype">size_t</span> nextCommandIdx;</div><div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;    };</div><div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;</div><div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;    std::vector&lt;SnapshotPair&gt; mTargetSnapshots;</div><div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;</div><div class="line"><a name="l00067"></a><span class="lineno"><a class="line" href="classpepr3d_1_1_command_manager.html#ae1b91a069626a707e392bdb92772a487">   67</a></span>&#160;    <span class="keywordtype">size_t</span> <a class="code" href="classpepr3d_1_1_command_manager.html#ae1b91a069626a707e392bdb92772a487">mPosFromEnd</a> = 0;</div><div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;</div><div class="line"><a name="l00070"></a><span class="lineno"><a class="line" href="classpepr3d_1_1_command_manager.html#a4c73b4cacd523878dbef2cb7ed4805fa">   70</a></span>&#160;    <span class="keywordtype">size_t</span> <a class="code" href="classpepr3d_1_1_command_manager.html#a4c73b4cacd523878dbef2cb7ed4805fa">mVersion</a> = 0;</div><div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;</div><div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;    <span class="keywordtype">void</span> clearFutureState();</div><div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;</div><div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;    <span class="keyword">auto</span> <a class="code" href="classpepr3d_1_1_command_manager.html#a5f8002ebe6e7f1beb7f6176d424bae50">getPrevSnapshotIterator</a>() const -&gt; decltype(std::declval&lt;const std::vector&lt;SnapshotPair&gt;&gt;().begin());</div><div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;</div><div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;    <span class="keywordtype">bool</span> <a class="code" href="classpepr3d_1_1_command_manager.html#a96a37fef29ecd232b90da0612b402310">shouldSaveState</a>() const;</div><div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;</div><div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;    <span class="keywordtype">bool</span> <a class="code" href="classpepr3d_1_1_command_manager.html#a40345eec97e82997c3e3a0f231185e30">joinWithLastCommand</a>(<a class="code" href="classpepr3d_1_1_command_base.html">CommandBaseType</a>&amp; command);</div><div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;</div><div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;    <span class="keywordtype">size_t</span> getNumOfCommandsSinceSnapshot() const;</div><div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;</div><div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;    <a class="code" href="classpepr3d_1_1_command_base.html">CommandBaseType</a>&amp; <a class="code" href="classpepr3d_1_1_command_manager.html#a1dc9b90a3f5a6f14502999187a9d45ef">getLastCommand</a>() {</div><div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;        <span class="comment">// allow non const access for command manager</span></div><div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;        <span class="keyword">const</span> <span class="keyword">auto</span>* constThis = static_cast&lt;const decltype(this)&gt;(<span class="keyword">this</span>);</div><div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;        <span class="keywordflow">return</span> const_cast&lt;CommandBaseType&amp;&gt;(constThis-&gt;getLastCommand());</div><div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160;    }</div><div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160;};</div><div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160;</div><div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> Target&gt;</div><div class="line"><a name="l00093"></a><span class="lineno"><a class="line" href="classpepr3d_1_1_command_manager.html#a5f8002ebe6e7f1beb7f6176d424bae50">   93</a></span>&#160;<span class="keyword">auto</span> <a class="code" href="classpepr3d_1_1_command_manager.html#a5f8002ebe6e7f1beb7f6176d424bae50">CommandManager&lt;Target&gt;::getPrevSnapshotIterator</a>() const</div><div class="line"><a name="l00094"></a><span class="lineno">   94</span>&#160;    -&gt; decltype(std::declval&lt;const std::vector&lt;SnapshotPair&gt;&gt;().begin()) {</div><div class="line"><a name="l00095"></a><span class="lineno">   95</span>&#160;    P_ASSERT(mPosFromEnd &lt;= mCommandHistory.size());</div><div class="line"><a name="l00096"></a><span class="lineno">   96</span>&#160;</div><div class="line"><a name="l00097"></a><span class="lineno">   97</span>&#160;    <span class="keyword">const</span> <span class="keywordtype">size_t</span> nextCommandIdx = mCommandHistory.size() - mPosFromEnd;</div><div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160;</div><div class="line"><a name="l00099"></a><span class="lineno">   99</span>&#160;    <span class="comment">// Find last snapshot that is saved before next command</span></div><div class="line"><a name="l00100"></a><span class="lineno">  100</span>&#160;    <span class="keyword">auto</span> prevSnapshotIt = std::prev(mTargetSnapshots.end());</div><div class="line"><a name="l00101"></a><span class="lineno">  101</span>&#160;    <span class="keywordflow">while</span>(prevSnapshotIt-&gt;nextCommandIdx &gt; nextCommandIdx) {</div><div class="line"><a name="l00102"></a><span class="lineno">  102</span>&#160;        prevSnapshotIt = std::prev(prevSnapshotIt);</div><div class="line"><a name="l00103"></a><span class="lineno">  103</span>&#160;    }</div><div class="line"><a name="l00104"></a><span class="lineno">  104</span>&#160;</div><div class="line"><a name="l00105"></a><span class="lineno">  105</span>&#160;    <span class="keywordflow">return</span> prevSnapshotIt;</div><div class="line"><a name="l00106"></a><span class="lineno">  106</span>&#160;}</div><div class="line"><a name="l00107"></a><span class="lineno">  107</span>&#160;</div><div class="line"><a name="l00108"></a><span class="lineno">  108</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> Target&gt;</div><div class="line"><a name="l00109"></a><span class="lineno"><a class="line" href="classpepr3d_1_1_command_manager.html#a0aae9681640f09da9c908154b805273e">  109</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="classpepr3d_1_1_command_manager.html#a0aae9681640f09da9c908154b805273e">CommandManager&lt;Target&gt;::execute</a>(std::unique_ptr&lt;CommandBaseType&gt;&amp;&amp; command, <span class="keywordtype">bool</span> join) {</div><div class="line"><a name="l00110"></a><span class="lineno">  110</span>&#160;    clearFutureState();</div><div class="line"><a name="l00111"></a><span class="lineno">  111</span>&#160;</div><div class="line"><a name="l00112"></a><span class="lineno">  112</span>&#160;    <span class="comment">// Increment the version counter</span></div><div class="line"><a name="l00113"></a><span class="lineno">  113</span>&#160;    mVersion++;</div><div class="line"><a name="l00114"></a><span class="lineno">  114</span>&#160;</div><div class="line"><a name="l00115"></a><span class="lineno">  115</span>&#160;    <span class="comment">// Command is either stored in history or joined to the last one</span></div><div class="line"><a name="l00116"></a><span class="lineno">  116</span>&#160;    <span class="keywordflow">if</span>(!join || !joinWithLastCommand(*command)) {</div><div class="line"><a name="l00117"></a><span class="lineno">  117</span>&#160;        <span class="comment">// Save target&#39;s state every few commands</span></div><div class="line"><a name="l00118"></a><span class="lineno">  118</span>&#160;        <span class="keywordflow">if</span>(shouldSaveState()) {</div><div class="line"><a name="l00119"></a><span class="lineno">  119</span>&#160;            <span class="keyword">const</span> <span class="keywordtype">size_t</span> nextCommandIdx = mCommandHistory.size() - mPosFromEnd;</div><div class="line"><a name="l00120"></a><span class="lineno">  120</span>&#160;            mTargetSnapshots.push_back({mTarget.saveState(), nextCommandIdx});</div><div class="line"><a name="l00121"></a><span class="lineno">  121</span>&#160;        }</div><div class="line"><a name="l00122"></a><span class="lineno">  122</span>&#160;</div><div class="line"><a name="l00123"></a><span class="lineno">  123</span>&#160;        command-&gt;run(mTarget);</div><div class="line"><a name="l00124"></a><span class="lineno">  124</span>&#160;        mCommandHistory.emplace_back(std::move(command));</div><div class="line"><a name="l00125"></a><span class="lineno">  125</span>&#160;    } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00126"></a><span class="lineno">  126</span>&#160;        command-&gt;run(mTarget);</div><div class="line"><a name="l00127"></a><span class="lineno">  127</span>&#160;    }</div><div class="line"><a name="l00128"></a><span class="lineno">  128</span>&#160;}</div><div class="line"><a name="l00129"></a><span class="lineno">  129</span>&#160;</div><div class="line"><a name="l00130"></a><span class="lineno">  130</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> Target&gt;</div><div class="line"><a name="l00131"></a><span class="lineno"><a class="line" href="classpepr3d_1_1_command_manager.html#af71406e4f6aee85b1cb9fe02b9a8b13e">  131</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="classpepr3d_1_1_command_manager.html#af71406e4f6aee85b1cb9fe02b9a8b13e">CommandManager&lt;Target&gt;::undo</a>() {</div><div class="line"><a name="l00132"></a><span class="lineno">  132</span>&#160;    <span class="keywordflow">if</span>(!canUndo())</div><div class="line"><a name="l00133"></a><span class="lineno">  133</span>&#160;        <span class="keywordflow">return</span>;</div><div class="line"><a name="l00134"></a><span class="lineno">  134</span>&#160;</div><div class="line"><a name="l00135"></a><span class="lineno">  135</span>&#160;    <span class="comment">// Increment the version counter</span></div><div class="line"><a name="l00136"></a><span class="lineno">  136</span>&#160;    mVersion++;</div><div class="line"><a name="l00137"></a><span class="lineno">  137</span>&#160;</div><div class="line"><a name="l00138"></a><span class="lineno">  138</span>&#160;    mPosFromEnd++;</div><div class="line"><a name="l00139"></a><span class="lineno">  139</span>&#160;    <span class="keyword">auto</span> prevSnapshotIt = getPrevSnapshotIterator();</div><div class="line"><a name="l00140"></a><span class="lineno">  140</span>&#160;    mTarget.loadState(prevSnapshotIt-&gt;state);</div><div class="line"><a name="l00141"></a><span class="lineno">  141</span>&#160;</div><div class="line"><a name="l00142"></a><span class="lineno">  142</span>&#160;    <span class="comment">// Execute all commands between last snapshot and desired state</span></div><div class="line"><a name="l00143"></a><span class="lineno">  143</span>&#160;    <span class="keywordflow">for</span>(<span class="keywordtype">size_t</span> i = prevSnapshotIt-&gt;nextCommandIdx; i &lt; mCommandHistory.size() - mPosFromEnd; i++) {</div><div class="line"><a name="l00144"></a><span class="lineno">  144</span>&#160;        mCommandHistory[i]-&gt;run(mTarget);</div><div class="line"><a name="l00145"></a><span class="lineno">  145</span>&#160;    }</div><div class="line"><a name="l00146"></a><span class="lineno">  146</span>&#160;}</div><div class="line"><a name="l00147"></a><span class="lineno">  147</span>&#160;</div><div class="line"><a name="l00148"></a><span class="lineno">  148</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> Target&gt;</div><div class="line"><a name="l00149"></a><span class="lineno"><a class="line" href="classpepr3d_1_1_command_manager.html#acb90e67e6e97c0d143ddb9e67ccbebb2">  149</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="classpepr3d_1_1_command_manager.html#acb90e67e6e97c0d143ddb9e67ccbebb2">CommandManager&lt;Target&gt;::redo</a>() {</div><div class="line"><a name="l00150"></a><span class="lineno">  150</span>&#160;    <span class="keywordflow">if</span>(!canRedo())</div><div class="line"><a name="l00151"></a><span class="lineno">  151</span>&#160;        <span class="keywordflow">return</span>;</div><div class="line"><a name="l00152"></a><span class="lineno">  152</span>&#160;</div><div class="line"><a name="l00153"></a><span class="lineno">  153</span>&#160;    <span class="comment">// Increment the version counter</span></div><div class="line"><a name="l00154"></a><span class="lineno">  154</span>&#160;    mVersion++;</div><div class="line"><a name="l00155"></a><span class="lineno">  155</span>&#160;</div><div class="line"><a name="l00156"></a><span class="lineno">  156</span>&#160;    <span class="keyword">const</span> <span class="keywordtype">size_t</span> nextCommandIdx = mCommandHistory.size() - mPosFromEnd;</div><div class="line"><a name="l00157"></a><span class="lineno">  157</span>&#160;    <span class="keywordflow">if</span>(mCommandHistory[nextCommandIdx]-&gt;isSlowCommand()) {</div><div class="line"><a name="l00158"></a><span class="lineno">  158</span>&#160;        <span class="comment">// Try to restore future snapshot to avoid doing a slow command again</span></div><div class="line"><a name="l00159"></a><span class="lineno">  159</span>&#160;        <span class="keyword">auto</span> nextSnapshotIt = std::next(getPrevSnapshotIterator());</div><div class="line"><a name="l00160"></a><span class="lineno">  160</span>&#160;        <span class="keywordflow">if</span>(nextSnapshotIt != mTargetSnapshots.end()) {</div><div class="line"><a name="l00161"></a><span class="lineno">  161</span>&#160;            mTarget.loadState(nextSnapshotIt-&gt;state);</div><div class="line"><a name="l00162"></a><span class="lineno">  162</span>&#160;        } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00163"></a><span class="lineno">  163</span>&#160;            mCommandHistory[nextCommandIdx]-&gt;run(mTarget);</div><div class="line"><a name="l00164"></a><span class="lineno">  164</span>&#160;        }</div><div class="line"><a name="l00165"></a><span class="lineno">  165</span>&#160;</div><div class="line"><a name="l00166"></a><span class="lineno">  166</span>&#160;    } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00167"></a><span class="lineno">  167</span>&#160;        mCommandHistory[nextCommandIdx]-&gt;run(mTarget);</div><div class="line"><a name="l00168"></a><span class="lineno">  168</span>&#160;    }</div><div class="line"><a name="l00169"></a><span class="lineno">  169</span>&#160;</div><div class="line"><a name="l00170"></a><span class="lineno">  170</span>&#160;    mPosFromEnd--;</div><div class="line"><a name="l00171"></a><span class="lineno">  171</span>&#160;}</div><div class="line"><a name="l00172"></a><span class="lineno">  172</span>&#160;</div><div class="line"><a name="l00173"></a><span class="lineno">  173</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> Target&gt;</div><div class="line"><a name="l00174"></a><span class="lineno"><a class="line" href="classpepr3d_1_1_command_manager.html#a2d53a763697329e206e72ddeef1ce75b">  174</a></span>&#160;<span class="keywordtype">bool</span> <a class="code" href="classpepr3d_1_1_command_manager.html#a2d53a763697329e206e72ddeef1ce75b">CommandManager&lt;Target&gt;::canUndo</a>()<span class="keyword"> const </span>{</div><div class="line"><a name="l00175"></a><span class="lineno">  175</span>&#160;    <span class="keywordflow">return</span> mCommandHistory.size() &gt; mPosFromEnd;</div><div class="line"><a name="l00176"></a><span class="lineno">  176</span>&#160;}</div><div class="line"><a name="l00177"></a><span class="lineno">  177</span>&#160;</div><div class="line"><a name="l00178"></a><span class="lineno">  178</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> Target&gt;</div><div class="line"><a name="l00179"></a><span class="lineno"><a class="line" href="classpepr3d_1_1_command_manager.html#a2ae3625cc0baac8bb27f659ee0182eff">  179</a></span>&#160;<span class="keywordtype">bool</span> <a class="code" href="classpepr3d_1_1_command_manager.html#a2ae3625cc0baac8bb27f659ee0182eff">CommandManager&lt;Target&gt;::canRedo</a>()<span class="keyword"> const </span>{</div><div class="line"><a name="l00180"></a><span class="lineno">  180</span>&#160;    <span class="keywordflow">return</span> mPosFromEnd != 0;</div><div class="line"><a name="l00181"></a><span class="lineno">  181</span>&#160;}</div><div class="line"><a name="l00182"></a><span class="lineno">  182</span>&#160;</div><div class="line"><a name="l00183"></a><span class="lineno">  183</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> Target&gt;</div><div class="line"><a name="l00184"></a><span class="lineno"><a class="line" href="classpepr3d_1_1_command_manager.html#a1dc9b90a3f5a6f14502999187a9d45ef">  184</a></span>&#160;<span class="keyword">const</span> <span class="keyword">typename</span> <a class="code" href="classpepr3d_1_1_command_base.html">CommandManager&lt;Target&gt;::CommandBaseType</a>&amp; <a class="code" href="classpepr3d_1_1_command_manager.html#a1dc9b90a3f5a6f14502999187a9d45ef">CommandManager&lt;Target&gt;::getLastCommand</a>()<span class="keyword"> const </span>{</div><div class="line"><a name="l00185"></a><span class="lineno">  185</span>&#160;    <span class="keywordflow">if</span>(!canUndo()) {</div><div class="line"><a name="l00186"></a><span class="lineno">  186</span>&#160;        <span class="keywordflow">throw</span> std::logic_error(<span class="stringliteral">&quot;No last command exists&quot;</span>);</div><div class="line"><a name="l00187"></a><span class="lineno">  187</span>&#160;    }</div><div class="line"><a name="l00188"></a><span class="lineno">  188</span>&#160;</div><div class="line"><a name="l00189"></a><span class="lineno">  189</span>&#160;    <span class="keywordflow">return</span> *mCommandHistory[mCommandHistory.size() - mPosFromEnd - 1];</div><div class="line"><a name="l00190"></a><span class="lineno">  190</span>&#160;}</div><div class="line"><a name="l00191"></a><span class="lineno">  191</span>&#160;</div><div class="line"><a name="l00192"></a><span class="lineno">  192</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> Target&gt;</div><div class="line"><a name="l00193"></a><span class="lineno"><a class="line" href="classpepr3d_1_1_command_manager.html#ab5767a90a4f309d166210a8e43dec560">  193</a></span>&#160;<span class="keyword">const</span> <span class="keyword">typename</span> <a class="code" href="classpepr3d_1_1_command_base.html">CommandManager&lt;Target&gt;::CommandBaseType</a>&amp; <a class="code" href="classpepr3d_1_1_command_manager.html#ab5767a90a4f309d166210a8e43dec560">CommandManager&lt;Target&gt;::getNextCommand</a>()<span class="keyword"> const </span>{</div><div class="line"><a name="l00194"></a><span class="lineno">  194</span>&#160;    <span class="keywordflow">if</span>(!canRedo()) {</div><div class="line"><a name="l00195"></a><span class="lineno">  195</span>&#160;        <span class="keywordflow">throw</span> std::logic_error(<span class="stringliteral">&quot;No next command exists&quot;</span>);</div><div class="line"><a name="l00196"></a><span class="lineno">  196</span>&#160;    }</div><div class="line"><a name="l00197"></a><span class="lineno">  197</span>&#160;</div><div class="line"><a name="l00198"></a><span class="lineno">  198</span>&#160;    <span class="keywordflow">return</span> *mCommandHistory[mCommandHistory.size() - mPosFromEnd];</div><div class="line"><a name="l00199"></a><span class="lineno">  199</span>&#160;}</div><div class="line"><a name="l00200"></a><span class="lineno">  200</span>&#160;</div><div class="line"><a name="l00201"></a><span class="lineno">  201</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> Target&gt;</div><div class="line"><a name="l00202"></a><span class="lineno">  202</span>&#160;<span class="keywordtype">void</span> <a class="code" href="classpepr3d_1_1_command_manager.html">CommandManager&lt;Target&gt;::clearFutureState</a>() {</div><div class="line"><a name="l00203"></a><span class="lineno">  203</span>&#160;    <span class="keywordflow">if</span>(mPosFromEnd &gt; 0) {</div><div class="line"><a name="l00204"></a><span class="lineno">  204</span>&#160;        <span class="comment">// Clear all future snapshots</span></div><div class="line"><a name="l00205"></a><span class="lineno">  205</span>&#160;        mTargetSnapshots.erase(std::next(getPrevSnapshotIterator()), mTargetSnapshots.end());</div><div class="line"><a name="l00206"></a><span class="lineno">  206</span>&#160;</div><div class="line"><a name="l00207"></a><span class="lineno">  207</span>&#160;        <span class="comment">// Clear all future commands</span></div><div class="line"><a name="l00208"></a><span class="lineno">  208</span>&#160;        mCommandHistory.erase(std::prev(mCommandHistory.end(), mPosFromEnd), mCommandHistory.end());</div><div class="line"><a name="l00209"></a><span class="lineno">  209</span>&#160;</div><div class="line"><a name="l00210"></a><span class="lineno">  210</span>&#160;        mPosFromEnd = 0;</div><div class="line"><a name="l00211"></a><span class="lineno">  211</span>&#160;    }</div><div class="line"><a name="l00212"></a><span class="lineno">  212</span>&#160;}</div><div class="line"><a name="l00213"></a><span class="lineno">  213</span>&#160;</div><div class="line"><a name="l00214"></a><span class="lineno">  214</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> Target&gt;</div><div class="line"><a name="l00215"></a><span class="lineno"><a class="line" href="classpepr3d_1_1_command_manager.html#a96a37fef29ecd232b90da0612b402310">  215</a></span>&#160;<span class="keywordtype">bool</span> <a class="code" href="classpepr3d_1_1_command_manager.html#a96a37fef29ecd232b90da0612b402310">CommandManager&lt;Target&gt;::shouldSaveState</a>()<span class="keyword"> const </span>{</div><div class="line"><a name="l00216"></a><span class="lineno">  216</span>&#160;    <span class="keywordflow">if</span>(mTargetSnapshots.empty()) {</div><div class="line"><a name="l00217"></a><span class="lineno">  217</span>&#160;        <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l00218"></a><span class="lineno">  218</span>&#160;    }</div><div class="line"><a name="l00219"></a><span class="lineno">  219</span>&#160;</div><div class="line"><a name="l00220"></a><span class="lineno">  220</span>&#160;    <span class="keyword">const</span> <span class="keywordtype">size_t</span> commandsSinceSnapshot = getNumOfCommandsSinceSnapshot();</div><div class="line"><a name="l00221"></a><span class="lineno">  221</span>&#160;</div><div class="line"><a name="l00222"></a><span class="lineno">  222</span>&#160;    <span class="keywordflow">return</span> (canUndo() &amp;&amp; getLastCommand().isSlowCommand() &amp;&amp; commandsSinceSnapshot != 0) ||</div><div class="line"><a name="l00223"></a><span class="lineno">  223</span>&#160;           commandsSinceSnapshot &gt;= SNAPSHOT_FREQUENCY;</div><div class="line"><a name="l00224"></a><span class="lineno">  224</span>&#160;}</div><div class="line"><a name="l00225"></a><span class="lineno">  225</span>&#160;</div><div class="line"><a name="l00226"></a><span class="lineno">  226</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> Target&gt;</div><div class="line"><a name="l00227"></a><span class="lineno"><a class="line" href="classpepr3d_1_1_command_manager.html#a40345eec97e82997c3e3a0f231185e30">  227</a></span>&#160;<span class="keywordtype">bool</span> <a class="code" href="classpepr3d_1_1_command_manager.html#a40345eec97e82997c3e3a0f231185e30">CommandManager&lt;Target&gt;::joinWithLastCommand</a>(<a class="code" href="classpepr3d_1_1_command_base.html">CommandBaseType</a>&amp; command) {</div><div class="line"><a name="l00228"></a><span class="lineno">  228</span>&#160;    <span class="keywordflow">if</span>(!canUndo() || !getLastCommand().canBeJoined())</div><div class="line"><a name="l00229"></a><span class="lineno">  229</span>&#160;        <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l00230"></a><span class="lineno">  230</span>&#160;</div><div class="line"><a name="l00231"></a><span class="lineno">  231</span>&#160;    <span class="keywordflow">if</span>(getLastCommand().joinCommand(command)) {</div><div class="line"><a name="l00232"></a><span class="lineno">  232</span>&#160;        <span class="comment">// If the command that got modified has a valid snapshot in front of it destroy it</span></div><div class="line"><a name="l00233"></a><span class="lineno">  233</span>&#160;        <span class="keywordflow">if</span>(getNumOfCommandsSinceSnapshot() == 0) {</div><div class="line"><a name="l00234"></a><span class="lineno">  234</span>&#160;            mTargetSnapshots.erase(std::prev(mTargetSnapshots.end()), mTargetSnapshots.end());</div><div class="line"><a name="l00235"></a><span class="lineno">  235</span>&#160;        }</div><div class="line"><a name="l00236"></a><span class="lineno">  236</span>&#160;        <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l00237"></a><span class="lineno">  237</span>&#160;    } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00238"></a><span class="lineno">  238</span>&#160;        <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l00239"></a><span class="lineno">  239</span>&#160;    }</div><div class="line"><a name="l00240"></a><span class="lineno">  240</span>&#160;}</div><div class="line"><a name="l00241"></a><span class="lineno">  241</span>&#160;</div><div class="line"><a name="l00242"></a><span class="lineno">  242</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> Target&gt;</div><div class="line"><a name="l00243"></a><span class="lineno">  243</span>&#160;<span class="keywordtype">size_t</span> <a class="code" href="classpepr3d_1_1_command_manager.html">CommandManager&lt;Target&gt;::getNumOfCommandsSinceSnapshot</a>()<span class="keyword"> const </span>{</div><div class="line"><a name="l00244"></a><span class="lineno">  244</span>&#160;    <span class="keyword">const</span> <span class="keywordtype">size_t</span> nextCommandIdx = mCommandHistory.size() - mPosFromEnd;</div><div class="line"><a name="l00245"></a><span class="lineno">  245</span>&#160;    <span class="keywordflow">return</span> nextCommandIdx - (getPrevSnapshotIterator()-&gt;nextCommandIdx - 1);</div><div class="line"><a name="l00246"></a><span class="lineno">  246</span>&#160;}</div><div class="line"><a name="l00247"></a><span class="lineno">  247</span>&#160;</div><div class="line"><a name="l00248"></a><span class="lineno">  248</span>&#160;}  <span class="comment">// namespace pepr3d</span></div><div class="ttc" id="classpepr3d_1_1_command_manager_html_a55847061c90eb00139370aa16d88a52a"><div class="ttname"><a href="classpepr3d_1_1_command_manager.html#a55847061c90eb00139370aa16d88a52a">pepr3d::CommandManager::mCommandHistory</a></div><div class="ttdeci">std::vector&lt; std::unique_ptr&lt; CommandBaseType &gt; &gt; mCommandHistory</div><div class="ttdoc">Executed and possibly future commands.</div><div class="ttdef"><b>Definition:</b> CommandManager.h:56</div></div>
<div class="ttc" id="classpepr3d_1_1_command_manager_html_ae889dad593d812deb65c56c07a32bfdb"><div class="ttname"><a href="classpepr3d_1_1_command_manager.html#ae889dad593d812deb65c56c07a32bfdb">pepr3d::CommandManager::SNAPSHOT_FREQUENCY</a></div><div class="ttdeci">static const int SNAPSHOT_FREQUENCY</div><div class="ttdoc">How often snapshots of the target should be saved (at minimum)</div><div class="ttdef"><b>Definition:</b> CommandManager.h:21</div></div>
<div class="ttc" id="classpepr3d_1_1_command_manager_html_af71406e4f6aee85b1cb9fe02b9a8b13e"><div class="ttname"><a href="classpepr3d_1_1_command_manager.html#af71406e4f6aee85b1cb9fe02b9a8b13e">pepr3d::CommandManager::undo</a></div><div class="ttdeci">void undo()</div><div class="ttdoc">Undo a single command operation.</div><div class="ttdef"><b>Definition:</b> CommandManager.h:131</div></div>
<div class="ttc" id="namespacepepr3d_html"><div class="ttname"><a href="namespacepepr3d.html">pepr3d</a></div><div class="ttdoc">Fix for CGAL bugs in polygon with holes verification Contained in CGAL PR #3688, likely to be in 4....</div><div class="ttdef"><b>Definition:</b> CmdColorManager.h:9</div></div>
<div class="ttc" id="classpepr3d_1_1_command_manager_html"><div class="ttname"><a href="classpepr3d_1_1_command_manager.html">pepr3d::CommandManager</a></div><div class="ttdoc">CommandManager handles all undoable operations on target in the form of commands See.</div><div class="ttdef"><b>Definition:</b> CommandManager.h:15</div></div>
<div class="ttc" id="classpepr3d_1_1_command_manager_html_ae1b91a069626a707e392bdb92772a487"><div class="ttname"><a href="classpepr3d_1_1_command_manager.html#ae1b91a069626a707e392bdb92772a487">pepr3d::CommandManager::mPosFromEnd</a></div><div class="ttdeci">size_t mPosFromEnd</div><div class="ttdoc">Position from end of the stack.</div><div class="ttdef"><b>Definition:</b> CommandManager.h:67</div></div>
<div class="ttc" id="classpepr3d_1_1_command_manager_html_a4c73b4cacd523878dbef2cb7ed4805fa"><div class="ttname"><a href="classpepr3d_1_1_command_manager.html#a4c73b4cacd523878dbef2cb7ed4805fa">pepr3d::CommandManager::mVersion</a></div><div class="ttdeci">size_t mVersion</div><div class="ttdoc">Cumulative version number which gets incremented every single time a command is executed or Undo/Redo...</div><div class="ttdef"><b>Definition:</b> CommandManager.h:70</div></div>
<div class="ttc" id="classpepr3d_1_1_command_manager_html_a1dc9b90a3f5a6f14502999187a9d45ef"><div class="ttname"><a href="classpepr3d_1_1_command_manager.html#a1dc9b90a3f5a6f14502999187a9d45ef">pepr3d::CommandManager::getLastCommand</a></div><div class="ttdeci">const CommandBaseType &amp; getLastCommand() const</div><div class="ttdoc">Get last command that was executed (ie the command to be undoed)</div><div class="ttdef"><b>Definition:</b> CommandManager.h:184</div></div>
<div class="ttc" id="classpepr3d_1_1_command_manager_html_acb90e67e6e97c0d143ddb9e67ccbebb2"><div class="ttname"><a href="classpepr3d_1_1_command_manager.html#acb90e67e6e97c0d143ddb9e67ccbebb2">pepr3d::CommandManager::redo</a></div><div class="ttdeci">void redo()</div><div class="ttdoc">Redo a single command (if possible)</div><div class="ttdef"><b>Definition:</b> CommandManager.h:149</div></div>
<div class="ttc" id="classpepr3d_1_1_command_manager_html_ab5767a90a4f309d166210a8e43dec560"><div class="ttname"><a href="classpepr3d_1_1_command_manager.html#ab5767a90a4f309d166210a8e43dec560">pepr3d::CommandManager::getNextCommand</a></div><div class="ttdeci">const CommandBaseType &amp; getNextCommand() const</div><div class="ttdoc">Get next command to be redoed if it exists.</div><div class="ttdef"><b>Definition:</b> CommandManager.h:193</div></div>
<div class="ttc" id="classpepr3d_1_1_command_manager_html_a5f8002ebe6e7f1beb7f6176d424bae50"><div class="ttname"><a href="classpepr3d_1_1_command_manager.html#a5f8002ebe6e7f1beb7f6176d424bae50">pepr3d::CommandManager::getPrevSnapshotIterator</a></div><div class="ttdeci">auto getPrevSnapshotIterator() const -&gt; decltype(std::declval&lt; const std::vector&lt; SnapshotPair &gt;&gt;().begin())</div><div class="ttdoc">Get snapshot before current state.</div><div class="ttdef"><b>Definition:</b> CommandManager.h:93</div></div>
<div class="ttc" id="classpepr3d_1_1_command_manager_html_a96a37fef29ecd232b90da0612b402310"><div class="ttname"><a href="classpepr3d_1_1_command_manager.html#a96a37fef29ecd232b90da0612b402310">pepr3d::CommandManager::shouldSaveState</a></div><div class="ttdeci">bool shouldSaveState() const</div><div class="ttdoc">Should we save state before next command.</div><div class="ttdef"><b>Definition:</b> CommandManager.h:215</div></div>
<div class="ttc" id="classpepr3d_1_1_command_manager_html_a95e84353863839ebded5131aef0c06b9"><div class="ttname"><a href="classpepr3d_1_1_command_manager.html#a95e84353863839ebded5131aef0c06b9">pepr3d::CommandManager::getVersionNumber</a></div><div class="ttdeci">size_t getVersionNumber() const</div><div class="ttdoc">Return the current version number, used to compare any dirty unsaved changes.</div><div class="ttdef"><b>Definition:</b> CommandManager.h:49</div></div>
<div class="ttc" id="classpepr3d_1_1_command_manager_html_a0aae9681640f09da9c908154b805273e"><div class="ttname"><a href="classpepr3d_1_1_command_manager.html#a0aae9681640f09da9c908154b805273e">pepr3d::CommandManager::execute</a></div><div class="ttdeci">void execute(std::unique_ptr&lt; CommandBaseType &gt; &amp;&amp;command, bool join=false)</div><div class="ttdoc">Execute a command, saving it into a history and removing all currently redoable commands.</div><div class="ttdef"><b>Definition:</b> CommandManager.h:109</div></div>
<div class="ttc" id="structpepr3d_1_1_command_manager_1_1_snapshot_pair_html"><div class="ttname"><a href="structpepr3d_1_1_command_manager_1_1_snapshot_pair.html">pepr3d::CommandManager::SnapshotPair</a></div><div class="ttdoc">Saved states of the target and commandId after them.</div><div class="ttdef"><b>Definition:</b> CommandManager.h:59</div></div>
<div class="ttc" id="classpepr3d_1_1_command_manager_html_aa4545583769603c741a2dab3e876a5fb"><div class="ttname"><a href="classpepr3d_1_1_command_manager.html#aa4545583769603c741a2dab3e876a5fb">pepr3d::CommandManager::CommandManager</a></div><div class="ttdeci">CommandManager(Target &amp;target)</div><div class="ttdoc">Create a command manager that will be operating around a snapshottable target.</div><div class="ttdef"><b>Definition:</b> CommandManager.h:24</div></div>
<div class="ttc" id="classpepr3d_1_1_command_manager_html_a2d53a763697329e206e72ddeef1ce75b"><div class="ttname"><a href="classpepr3d_1_1_command_manager.html#a2d53a763697329e206e72ddeef1ce75b">pepr3d::CommandManager::canUndo</a></div><div class="ttdeci">bool canUndo() const</div><div class="ttdoc">Is there a command that can be undoed?</div><div class="ttdef"><b>Definition:</b> CommandManager.h:174</div></div>
<div class="ttc" id="classpepr3d_1_1_command_manager_html_a40345eec97e82997c3e3a0f231185e30"><div class="ttname"><a href="classpepr3d_1_1_command_manager.html#a40345eec97e82997c3e3a0f231185e30">pepr3d::CommandManager::joinWithLastCommand</a></div><div class="ttdeci">bool joinWithLastCommand(CommandBaseType &amp;command)</div><div class="ttdoc">Join this command with the last one.</div><div class="ttdef"><b>Definition:</b> CommandManager.h:227</div></div>
<div class="ttc" id="classpepr3d_1_1_command_base_html"><div class="ttname"><a href="classpepr3d_1_1_command_base.html">pepr3d::CommandBase</a></div><div class="ttdoc">CommandBase is a base class for commands representing a single undoable operation....</div><div class="ttdef"><b>Definition:</b> Command.h:10</div></div>
<div class="ttc" id="classpepr3d_1_1_command_manager_html_a2ae3625cc0baac8bb27f659ee0182eff"><div class="ttname"><a href="classpepr3d_1_1_command_manager.html#a2ae3625cc0baac8bb27f659ee0182eff">pepr3d::CommandManager::canRedo</a></div><div class="ttdeci">bool canRedo() const</div><div class="ttdoc">Is there a command that can be redoed?</div><div class="ttdef"><b>Definition:</b> CommandManager.h:179</div></div>
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